Improvement in razor-strops



H. cRoFT. `Improvement -n Razor-Strp'ps..

No. 131,856. vPatented om. 1, 1m...

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` To all whom it may concern:

PATENT GEEICE.

HENRY GROFT, OF SPRINGFIELD, OHIO.

IMPROVEMENT IN RAZOR-STROPS.

Specification forming partof Letters Patent No. 131,856, dated October1,1872.

VBe it known that LHENRY CROET, of

l i Springfield, in the county of Clarke and State of Ohio, haveinvented anew and valuable Improvement in Razor-Strops; and I do herebydeclare that the following is a full, clear, and exact description oftheconstruction and operation of the same, reference being had to theannexed drawing making a part of this specification, and to the lettersand figures of reference marked thereon.

Figure l of the drawing is a representation of side view of myinvention. Fig. 2 is a crossseetion of myy invention. Fig. 3 is a detailView of my invention.

This invention has relation to razor-strops 5 and it consists ,in theconstruction of a doubleconcave body of hard wood made transverselyconvex, and isometric with regard to its sharpening-surfaces, saidsurfaces being covered with leather prepared for the purpose, as

g hereinafter described.

In the accompanying drawing, the letter A designates the wooden core orbody, which is preferably made of lignum-vit, box, or other hard andelastic wood which will not readily lose form under the pressure of therazor. In the manufacture of this body a handle, B, is turned at oneend. `The opposite concave surfaces lying lengthwise of the block maythen be sawn out, and these surfaces then dressed in a lathe orotherwise until they assume a transversely convex form, equal incurvature from end to end, both on the sharpening and on the finishingside ofthe strop. These surfaces are then finished by sandpapering andpolishing them until they are free from roughnesses and inequalities,when the body of the strop is completed.

If it is desired toeconomize the hard wood, the handle may be made ofsofter wood, and the strops may be sawn ont of the hard wood "plankinthe economical manner indicated in Fig. 3 of the drawing.

. The concave curve which runs lengthwise ofthe block on each side is anarc of a circle,

the circle being the same for both surfaces,

the objectv being to preserve a uniform effect upon the edge of therazor from end to end of the strop. The contour of the transverse convexcurve is preferably that of a iiat ellipse.

The wooden body of the strop having been prepared, the leathers aresecured to the curved surfaces thereof. These leathers consist of ahone-leather, a, and a finishing-strop, b. These leathers are preparedinthe following manner: First, the leather is saturated with purecastoroil, and is then what is called buffe-d. The leather thus preparedis used for the finishingside of the strop. For the hone-side a compoundor paste is made by combining with the casteroil-superiine iiour ofeme'ry and lamp-black.` Hog-skin is preferable to other leather, as itholds the paste better. I

The above description will enable any:y one skilled in theart to make mystrop.

I am well aware that it is not new to make a strop with a side concavelengthwise and transversely convex. broadly, such invention.

What I claim as my invention, and desire to secure by Letters Patent,is-

lhe strop herein described, consisting of the body having double-concaveand transversely-convex hard-wood surfaces isometric with each other,polished and covered, respectively, Y

of two witnesses. f

HENRY OEOFT.

Witnesses T. J. PRINGLE, SAME. SHELLABAEGER.

Hence I do not claim,`

